REFLECTIVE OPTICAL SENSOR, FIXING DEVICE, AND IMAGE FORMING APPARATUS

• Main Authors: MIYAGAKI KAZUYA, MONMA SUSUMU
• Format: Patent
• Language: English; Japanese
• Published: 04.04.2016
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MAGNETOGRAPHY; MEASURING; PHOTOGRAPHY; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To provide a reflective optical sensor that can improve the efficiency of use of light, and in turn contribute to the improvement of the accuracy of information on the surface of an irradiation target surface.SOLUTION: Light emitted from some of LEDs 60 arranged in array in the main scanning direction (Y-direction) passes through an opening 72 of a corresponding light-shielding member 74, is collected by a corresponding irradiation lens in an irradiation optical system 64, and with which a fixing belt 26 as an irradiation target surface is irradiated. Reflected light from the fixing belt 26 passes through a light-receiving optical system 66 and is received by a light receiving element 62. An opening part 72 has a shape in which a wall surface 72b farther from the light-receiving optical system 66, of wall surfaces 72a and 72b arranged opposite to each other in a Z-direction orthogonal to the array direction, becomes distant from the light-receiving optical system 66 toward the irradiation optical system 64 from the LEDs 60.SELECTED DRAWING: Figure 1 【課題】光利用効率を向上させることができ、ひいては被照射面の表面情報の精度向上に寄与できる反射型光学センサを提供する。【解決手段】主走査方向（Ｙ方向）にアレイ状に配置された一部のＬＥＤ６０から放射された光は、対応する遮光部材７４の開口部７２を通り、照射光学系６４の対応する照射用レンズで集光されて被照射面としての定着ベルト２６に照射される。定着ベルト２６からの反射光は受光光学系６６を通り受光素子６２に受光される。開口部７２は、アレイ方向と直交するＺ方向で対向する壁面７２ａ、７２ｂのうち、受光光学系６６から遠い方の壁面７２ｂが、ＬＥＤ６０から照射光学系６４に向かうにつれて、受光光学系６６から遠ざかる方向に傾斜している形状を有している。【選択図】図１